Fertilizer formed by the addition of ammonium sulfate and acid phosphate to calcium cyanamid and process of making same.



STATES. PAT NT FRANK S.

wnsrmumr, orfimsnmnn, trnii'nnssnn, assiouoa'ro mnnrcm crnumm comm, econronerron or name."

rnnrmiznn ronmnn at THE mmrroii or mnom scnrn'rn'nmi nom rnosrna'm so cnncmn crmmm m rnooass or name-sun No To allcohomttmcyconcemc Be it'known that I, FRANK S. WASHBURN, a citizen-of the United States, residing at Nashville, in the county of Davidson and.

State of Tennessee, have invented certain new and useful improvements in fertilizer formed by'the addition of ammonium sul fate and acid phosphate tocalcium cyanamidand processes of making same; and I monium sulfate, and has for its object the production of'an improved roduct which shall be free from certain disadvantages now found to accompany this mixing operation.

To these ends the invention consists in the novel steps constituting my. process as well as in the resultingproduct, all'of which .will

bemore fully hereinafter disclosed and par.-

-' ticularly pointed out in the claims.

Commercial calcium; cyanamid contains about 25 per. cent.- of calcium present as calciumjcyanamid.CaGN and about 20 per cent. of calcium present; as calciumhydroxid Ca(OH) V .In the presence of moisture the calcium cyanamid is converted -in part to calcium hydroxid Ca(OH) and in part to a double calcium salt having the CaCN. H CN according tothe following reactions:

'Whe'n cyanamid mixed with ammonium sulfate, nitrogen is driven off. from the mixture in theform ofammonia, NHas'which ordinarily escapes from the mixture and is of these two'materials -in the same mixture.

According to my invention, 'however,-now

to be disclosed, the above objection is re- "moved. I have discovered thatby adding.

acid phosphatefto the mixture of cyanamid and ammonium sulfate the loss'of. nitrogen is. prevented. This I have found is] due to two reactions; .first, the reaction ofcalcium r specification Letters Patent. Applioationnlednovember17,1914. senammevacaafj formula and free cyanamid, H ON int'hecyanamid with'acid phosphate where.-

by the calcium is fixed in the'. form of acid or neutral phosphates, in which form-it is no longer active toward. ammonium sulfate- 1n settmg free ammonia .and, second, thev reactlon whereby the ammonia set free by the interaction of the cyanamid' and ammop t nted se t. 5,1916; I

nium sulfate is combined with acid phosphate as an ammonium phosphate and calclum ammonium phosphate. more readlly understood from the following equations 3. 2 CaCN, |-.2H,PO,-b I p a H P O 2H ON 4. .2Ca (OH),-|-2 H,PO 2 8+ 2 2 same.

This can be I The-freed-am m'onia is not-only taken up w and fixed by my process, but the cause of the ammonia liberation,is eliminated. 1 {It will be seen that my process enables 'me"to obviate the above "objection, of loss ,of ammonia on-mixing 'cyanamid with armmonium sulfate. .Moreover,- the productproduced differs from the cyanamid inthat it no longer tends to liberate ammonia from ammoniumsulfate- What I claim is:-

mixture to prevent the escape of ammonia, substantiallylas described.

. 2. The herein described new fertilizer containingthe reaction products of commeri' l, calcium cyanamid, ammonium sulfate phosphate, substantially as. de-

1,1 The process of making a fertilizer mix ture which consists in mlxing commercial calcium cyanamid with ammonium sulfate and adding sufiicient' acid'phosphate to the cyanamidwith ammoniumsulfate and addg to said. mixture a sufficient quantity of "so. combined as to' be capable of reaction with any ammonia that may be liberated, substantially as described.

a fertilizermaterial havlng an 'acidtradical' i. The process of making a fertilizer g ma am which consists in mixing commercial cal- V Intcstimony whercofI afix my signature,

cium cyanamid with ammonium sulfate and in p'rcmnce of two witnesses.

adding to said mixture a sufficient quantity. FRANK S WASHBURN of a fertilizer phosphatic material having an acid radical 50' combined as to be adapted Witnesses to react with any ammonia that may be G. A. SCHURMAN,

liberated, substantially as described. A. D. Wmmmoim. 

